By Act 5, we see much falling action and finally a deneumont or resolution in the repairing of the relationships between the Montagues and the Capulets. After the knowledge of their children's deaths and purposes for killing themselves, they realize that this fight is no longer worth pursuing. The Prince says it best when he points out to them the problem that their fight has had on them, it has ironically killed their joys with love... love for each other.
Suspense continues to build until the end of the third scene. In the first scene, Romeo thinks that Juliet is dead (she's not) so he races to be with her. In scene ii, we learn he never got the letter and the Friar goes on high alert creating more drama as he too proceeds towards the tomb. In scene iii, Paris is there and Romeo realizes Juliet was about to marry someone else. After Romeo kills both Paris and himself, Juliet deals with this as she awakes. Never in another relationship has a man and woman had to watch each other die and deal with it. Talk about drama... it is served in Act V.